unplain-io

unplain-io MCP API

Model Context Protocol endpoint. One multiplexed JSON-RPC path, API key required.

GitHub OpenAPI

Operations 3

POST /api/mcp Send a JSON-RPC message #
GET /api/mcp Open a server-to-client SSE stream #
DELETE /api/mcp Terminate a session #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/unplain-io/openapi/unplain-io-mcp-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-feature-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-feature-list-result-schema.json
📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-vote-result-schema.json
📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-submit-result-schema.json
📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-json-rpc-request-schema.json
📊
JSONSchema
https://artifacts.apis.io/unplain-io/json-schema/unplain-io-json-rpc-response-schema.json

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OpenAPI Specification

unplain-io-mcp-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Unplain Io MCP API
  version: 1.0.0
  contact:
    name: Unplain
    email: info@unplain.io
    url: https://unplain.io/developers
  termsOfService: https://unplain.io/terms
  description: 'Operations tagged MCP across 2 of this provider''s published API definitions: app-unplain-io-openapi.json, unplain-io-openapi.json. Each path carries the servers of the definition it was published in.'
servers:
- url: https://app.unplain.io
  description: Unplain application API
tags:
- name: MCP
  description: Model Context Protocol endpoint. One multiplexed JSON-RPC path, API key required.
  externalDocs:
    description: Setup guide
    url: https://unplain.io/mcp
paths:
  /api/mcp:
    summary: Model Context Protocol endpoint (Streamable HTTP)
    description: 'The single MCP endpoint. It is stateless: no `Mcp-Session-Id` is issued, so every request stands alone and no session has to be kept consistent across replicas.'
    post:
      tags:
      - MCP
      security:
      - ApiKey: []
      operationId: mcpRpc
      summary: Send a JSON-RPC message
      description: 'Send one JSON-RPC request, notification or response. Per the Streamable HTTP transport the client must send `Accept: application/json, text/event-stream`; the reply is either a single JSON object or an SSE stream.'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/JsonRpcRequest'
            examples:
              toolsList:
                summary: List the available tools
                value:
                  jsonrpc: '2.0'
                  id: 1
                  method: tools/list
              getAccount:
                summary: Read the account's plan and limits
                value:
                  jsonrpc: '2.0'
                  id: 2
                  method: tools/call
                  params:
                    name: get_account
                    arguments: {}
      responses:
        '200':
          description: A JSON-RPC response, or an SSE stream carrying one.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcResponse'
            text/event-stream:
              schema:
                type: string
                description: Server-Sent Events framing.
        '202':
          description: A notification or response was accepted. No body.
        '401':
          description: Authentication failed. The body is a JSON-RPC error object whose `message` names both the problem and the fix, and `WWW-Authenticate` carries an RFC 6750 bearer challenge.
          headers:
            WWW-Authenticate:
              description: RFC 6750 challenge, for example `Bearer realm="Unplain MCP"`.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32001
                  message: 'No Unplain API key was sent. Add an ''Authorization: Bearer <your key>'' header. Keys are created in Unplain under Account settings, API keys.'
                id: null
        '413':
          description: Request body larger than 4 MiB.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '429':
          description: Too many failed authentication attempts from this address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '503':
          description: Unplain cannot verify API keys right now.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
    get:
      tags:
      - MCP
      security:
      - ApiKey: []
      operationId: mcpStream
      summary: Open a server-to-client SSE stream
      description: 'Requires `Accept: text/event-stream`. Used by clients that listen for server-initiated messages.'
      responses:
        '200':
          description: An SSE stream.
          content:
            text/event-stream:
              schema:
                type: string
        '401':
          description: Authentication failed. The body is a JSON-RPC error object whose `message` names both the problem and the fix, and `WWW-Authenticate` carries an RFC 6750 bearer challenge.
          headers:
            WWW-Authenticate:
              description: RFC 6750 challenge, for example `Bearer realm="Unplain MCP"`.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32001
                  message: 'No Unplain API key was sent. Add an ''Authorization: Bearer <your key>'' header. Keys are created in Unplain under Account settings, API keys.'
                id: null
        '405':
          description: This endpoint offers no stream for that request.
        '413':
          description: Request body larger than 4 MiB.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '429':
          description: Too many failed authentication attempts from this address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '503':
          description: Unplain cannot verify API keys right now.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
    delete:
      tags:
      - MCP
      security:
      - ApiKey: []
      operationId: mcpEndSession
      summary: Terminate a session
      description: Accepted for protocol conformance. This server is stateless, so there is no session to discard.
      responses:
        '200':
          description: Acknowledged.
        '401':
          description: Authentication failed. The body is a JSON-RPC error object whose `message` names both the problem and the fix, and `WWW-Authenticate` carries an RFC 6750 bearer challenge.
          headers:
            WWW-Authenticate:
              description: RFC 6750 challenge, for example `Bearer realm="Unplain MCP"`.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
              example:
                jsonrpc: '2.0'
                error:
                  code: -32001
                  message: 'No Unplain API key was sent. Add an ''Authorization: Bearer <your key>'' header. Keys are created in Unplain under Account settings, API keys.'
                id: null
        '413':
          description: Request body larger than 4 MiB.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '429':
          description: Too many failed authentication attempts from this address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
        '503':
          description: Unplain cannot verify API keys right now.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonRpcError'
    servers:
    - url: https://app.unplain.io
      description: Unplain application API
components:
  schemas:
    JsonRpcErrorObject:
      type: object
      required:
      - code
      - message
      properties:
        code:
          type: integer
        message:
          type: string
          description: 'Written for the person whose assistant just failed: it names the problem and the fix, and clients surface it verbatim.'
    JsonRpcResponse:
      type: object
      required:
      - jsonrpc
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          type:
          - string
          - integer
          - 'null'
        result:
          type: object
        error:
          $ref: '#/components/schemas/JsonRpcErrorObject'
    JsonRpcRequest:
      type: object
      required:
      - jsonrpc
      - method
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          type:
          - string
          - integer
        method:
          type: string
          examples:
          - initialize
          - tools/list
          - tools/call
        params:
          type: object
    JsonRpcError:
      type: object
      required:
      - jsonrpc
      - error
      - id
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        error:
          $ref: '#/components/schemas/JsonRpcErrorObject'
        id:
          type:
          - string
          - integer
          - 'null'
  securitySchemes:
    ApiKey:
      type: http
      scheme: bearer
      bearerFormat: unp_<base64url secret>
      description: 'An Unplain API key, created under Account settings, API keys, and sent as `Authorization: Bearer unp_...`. The key carries exactly the capabilities of the account''s plan: there is no separate API tier. Scopes are granted per key and enforced per MCP tool: `brand_themes:read`, `brand_themes:write`, `projects:read`, `projects:write`, `exports:write`, `ai_cover:write`, `ai_image:write`.'
externalDocs:
  description: Unplain developer documentation
  url: https://unplain.io/developers
x-refined-from:
- app-unplain-io-openapi.json
- unplain-io-openapi.json